/**
 * #      30
 * 名称   串联所有单词的子串
 * 链接   https://leetcode-cn.com/problems/substring-with-concatenation-of-all-words
 * 题解   [429](https://leetcode-cn.com/problems/substring-with-concatenation-of-all-words/solution)
 * 通过率 34.4%
 * 难道   困难
 */

